CN1981981A - Modified welding torch cathode for use in roughening a surface and related method - Google Patents
Modified welding torch cathode for use in roughening a surface and related method Download PDFInfo
- Publication number
- CN1981981A CN1981981A CNA2006100639557A CN200610063955A CN1981981A CN 1981981 A CN1981981 A CN 1981981A CN A2006100639557 A CNA2006100639557 A CN A2006100639557A CN 200610063955 A CN200610063955 A CN 200610063955A CN 1981981 A CN1981981 A CN 1981981A
- Authority
- CN
- China
- Prior art keywords
- welding gun
- tip
- arc
- roughening
- array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 52
- 238000007788 roughening Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 8
- 238000005516 engineering process Methods 0.000 claims description 14
- 238000010891 electric arc Methods 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 description 20
- 239000011248 coating agent Substances 0.000 description 19
- 239000000463 material Substances 0.000 description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 8
- 229910000951 Aluminide Inorganic materials 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 150000001399 aluminium compounds Chemical class 0.000 description 2
- 238000005524 ceramic coating Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001233 yttria-stabilized zirconia Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/013—Arc cutting, gouging, scarfing or desurfacing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/26—Accessories for electrodes, e.g. ignition tips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/001—Turbines
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Coating By Spraying Or Casting (AREA)
- Nozzles (AREA)
Abstract
A welding torch includes a torch body and a torch head, the torch head having a plurality of torch tips arranged in a dense array.
Description
Background technology
The present invention relates to a kind of welding gun of reverse electric arc of modification, be used to follow-up coating to make surface roughening.
Often coating is carried out in the metal surface, so as to strengthen resistance to wear, anti-erosion, anticorrosive, antioxygenic property or reduce surface temperature.Oxidation-corrosion protection the layer that is used for metal is based on the ability that the oxide forming element of the protectiveness such as aluminium and chromium is diffused into the surface.Can utilize thermal spraying and diffusion technique to apply the high-temperature oxydation coating of protectiveness, yet every kind of method all have its pluses and minuses.Heat insulating coat (TBC) comprises adhesive coating and ytrria, magnesia or the cerium oxide PSZ face coat on the base material.Can utilize multiple technologies to be coated with described zirconium surface coating, (EB-PVD) implements coating but all utilize air plasma spray (APS) or electro beam physics vapour deposition usually.Technology such as EB-PVD the application facet of ceramic coating commercial be successful, for example stabilizing zirconia is applied to aluminide surface (PtAl, simple aluminide, the MCrAlY of calorize).EB-PVD TBC zirconia columnar microstructure is anti-strain (strain tolerant), and on the viewpoint of history, peels off the life-span with respect to TBC, is better than the air plasma zirconia when high thermal cycle is used.Air plasma technology also produces the microstructure that has vertical crack, and it has improved anti-compliance and TBC circulation and peels off the life-span, and is as U.S. Patent No. 5,830, disclosed in 586.Trial with the air plasma ceramic deposition be applied to the coat of aluminide surface (the diffusion coating on the base material or on MCrAlY cover aluminide (over-aluminide)) as coating, still since smooth surface to be coated lack adhesion and the success.
Reverse the welding of electric arc, be also referred to as the reversed polarity arc welding, be used to, so that prepare for engaging from the surface removal oxide.For example referring to United States Patent(USP) Nos. 5,512,318; 5,466,905 and 5,462,609.In U.S. Patent No. 6,042, in 898, utilize the oxide on the weldering cleaning MCrAlY coating that reverses electric arc, the heat of alumina eltrolysis afterwards increases (thermally grown), next uses the zirconium surface coating and makes TBC.
Summary of the invention
According to the present invention, the welding gun that reverses electric arc also can be used for follow-up coating makes surface roughening, but common industrial welding gun can not prepare big surf zone effectively.Therefore, (for example, tungsten inert gas (TIG) welding gun) improvement is so that preparation is for the big surf zone of subsequent coated use effectively to the present invention relates to a kind of other common welding gun.
More particularly, common TIG welding gun has the single little tip that size can change.The present invention with the header modification of described welding gun for comprising little tip array.Described tip row more help the big surf zone of roughening, therefore make the more effective and minimizing cost of coating process.
In roughening technology, adopted and reversed the welding technology that electric arc connects, for example, utilize argon protection gas, but locate, so there is not electric arc to produce owing to described welding gun is maintained at apart from surface of the work certain distance (for example, 1/2 inch).The bombardment of resulting ion enough makes described surface of the work roughening to needed degree, so that good adhesion is arranged when guaranteeing to apply in subsequent handling.
Therefore, on the one hand, the present invention relates to a kind of welding gun that comprises torch body and arc welding gun head, described arc welding gun head has into a plurality of welding gun tips that closely spaced array is arranged.
On the other hand, the present invention relates to the technology that a kind of roughening is treated the surface of subsequent coated, described technology comprises: the welding gun that reverses electric arc a) is provided, and described welding gun has the arc welding gun head that has been equipped with the tip array; And b) crosses described surface to be coated and move described welding gun, but between described tip and described surface, do not form electric arc, so that the described surface of roughening whereby.
To describe the present invention in conjunction with the accompanying drawing of following identification now.
Description of drawings
Fig. 1 is the cross-sectional view that runs through an element, and described element has the ceramic surface coating that covers on the aluminide adhesive coating according to of the present invention; With
Fig. 2 is with schematic embodiment, the improved welding gun according to the present invention of illustrating of signal.
The specific embodiment
Fig. 1 shows element 10, and described element can be to have the gas turbine of ceramic coating or the high-temperature components of diesel engine or any other metalwork on it.Element 10 comprises that as lower metal base material 12 described metal-based layer 12 has aluminium compound layer 14, perhaps is covered to the adhesive coating on the metal base 12.More specifically, in a preferred embodiment, described base material is the metal alloy such as Ni-base, Ti-base or Co-base alloy.But base material 12 also can comprise other metal alloy, metal matrix composite materials and other material, the condition that the column crystal microstructure that promotion helps adhering to, continue as long as described base material can conduct enough heats forms.Adhesive coating 14 can be made up of any material that promotes face coat or TBC 16 to bond on the base material 12, and also can comprise, for example, simple aluminide, PtAl, or by aluminium being diffused into basic unit 12 or being diffused into any rich aluminium superficial layer that produces in the metal coating in described basic unit.
Before being coated with face coat 16, as carrying out roughening further describing in this literary composition, the described surface that is roughened 18 is amplified and is identified with the surface of adhesive coating.
Fig. 2 is with the welding gun 20 that illustrates improved, as to be particularly useful for roughening tack coat 14 surface of signal.Described welding gun comprises torch body 22 and arc welding gun head 28, and described main body has the power cable 24,26 that extends back therein.Described arc welding gun head 28 forms and comprises a plurality of less relatively tungsten electrode tips 30, and described tungsten electrode tip 30 is arranged with intensive regular array, the matrix arrangement to become row and column to arrange in this case.In shown example, per eight tips become delegation to be arranged parallel to each other four row, and the tip in every row all with the tip alinement of adjacent lines, thereby also can be described as and formed four lines eight row.Certainly, the accurate structure of the array of tip can change so that adapt to concrete application.For example, the tip of adjacent lines can interlock, and/or the whole pattern of described array also can change.
In use, in the technology that reverses electric arc, use welding gun 20, and in other common welding procedure, between electrode and electrically conductive workpiece, form low-amperage D.C. arc.In described technology, in the low-intensity electric current scope of about 0.5-45 ampere, described electrode has first electric polarity, and described surface of the work has second electric polarity opposite with first electric polarity.In same current strength scope, the electric polarity between described electrode and described surface of the work is opposite, thereby limits the polarity circulation.To repeat the described pole reversal in the pattern of low frequency in the scope of approximately per second 1-1000 circulation (cps) in preliminary election.But, according to roughening technology herein, owing to make welding gun and element 20 keep enough distances (for example, half inch), so there is not electric arc to produce.Thereby described welding gun is used as radio-frequency generator.When the array of described tip 30 crossed described surf zone and moves, described surface can be the metal that exposes or applied, and bombardment is roughened the oxidized surface that is exposed through ion, for follow-up coating step is prepared.The degree of roughening can change, but should reach at least 200 to 500RA the coefficient of roughness.
Though apply the ceramic surface coating at this on the tack coat by being combined in, and disclose the surface roughening technology of utilizing improved welding gun at this, above-mentioned technology also can be used in roughening parent metal or other base material that applied.
The Reference numeral table of comparisons
Face coat (TBC) 16
Welding gun 20
Arc welding gun head 28
Claims (10)
1, a kind of welding gun (20), described welding gun comprise torch body (22) and arc welding gun head (28), and described arc welding gun head has into a plurality of welding gun tips (30) that closely spaced array is arranged.
2, welding gun as claimed in claim 1, wherein said intensive array comprises a plurality of to straight row and column.
3, welding gun as claimed in claim 2 comprises multiple row and delegation at least.
4, welding gun as claimed in claim 2, wherein every row all comprise a plurality of tips (30).
5, welding gun as claimed in claim 4, the number of wherein said tip (30) can change between 2 to 100.
6, welding gun as claimed in claim 1, wherein said welding gun are the tungsten inert-gas welding rifles.
7, a kind of for subsequent coated is used to make the technology of surface roughening, comprising:
A) provide the welding gun (20) that reverses electric arc, described welding gun has the arc welding gun head (22) of the array of outfit tip (30); With
B) move described welding gun (20) and cross described surface to be coated, and between described tip (30) and described surface, do not form welding arc.
8, that method as claimed in claim 7, wherein said surface to be coated comprise is exposed, through electroplate or through coated metal surface.
9, method as claimed in claim 7, wherein during step b), with described surface roughening to the coefficient of roughness between 200 to 500RA.
10, method as claimed in claim 7, wherein step a) comprises the arc welding gun head that the tip that is equipped with intensive rectangular array is provided, described tip is arranged to multirow and multiple row.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/297409 | 2005-12-09 | ||
| US11/297,409 US20070131656A1 (en) | 2005-12-09 | 2005-12-09 | Modified welding torch cathode for use in roughening a surface and related method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1981981A true CN1981981A (en) | 2007-06-20 |
Family
ID=38138235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100639557A Pending CN1981981A (en) | 2005-12-09 | 2006-12-09 | Modified welding torch cathode for use in roughening a surface and related method |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20070131656A1 (en) |
| JP (1) | JP2007160307A (en) |
| KR (1) | KR20070061467A (en) |
| CN (1) | CN1981981A (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4368375A (en) * | 1976-02-03 | 1983-01-11 | The Merrick Corporation | Welding torch oscillating mechanical apparatus |
| US4960458A (en) * | 1989-12-05 | 1990-10-02 | Browning James A | Wire feed system for flame spray apparatus having increased wire |
| US5481084A (en) * | 1991-03-18 | 1996-01-02 | Aluminum Company Of America | Method for treating a surface such as a metal surface and producing products embodying such including lithoplate |
| US5187046A (en) * | 1991-03-18 | 1993-02-16 | Aluminum Company Of America | Arc-grained lithoplate |
| US5466905A (en) * | 1994-04-05 | 1995-11-14 | General Electric Company | Low electric D.C., low time rate polarity reversing arc welding method |
| EP0705911B1 (en) * | 1994-10-04 | 2001-12-05 | General Electric Company | Thermal barrier coating |
| US5512318A (en) * | 1995-03-29 | 1996-04-30 | Flow International Corporation | Method for preparing surfaces with an ultrahigh-pressure fan jet |
| US6042898A (en) * | 1998-12-15 | 2000-03-28 | United Technologies Corporation | Method for applying improved durability thermal barrier coatings |
| US6210812B1 (en) * | 1999-05-03 | 2001-04-03 | General Electric Company | Thermal barrier coating system |
-
2005
- 2005-12-09 US US11/297,409 patent/US20070131656A1/en not_active Abandoned
-
2006
- 2006-12-09 CN CNA2006100639557A patent/CN1981981A/en active Pending
- 2006-12-11 JP JP2006333401A patent/JP2007160307A/en not_active Withdrawn
- 2006-12-11 KR KR1020060125748A patent/KR20070061467A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070061467A (en) | 2007-06-13 |
| JP2007160307A (en) | 2007-06-28 |
| US20070131656A1 (en) | 2007-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070620 |